2. Home
  3. Domestic appliances
  4. Climate control
  5. Heat pumps
  6. NuTone
  7. JT4BE, Single Phase
JT4BE, Single Phase

NuTone JT4BE, Single Phase Installation guide

  • Hello! I am an AI chatbot trained to assist you with the NuTone JT4BE, Single Phase Installation guide. I’ve already reviewed the document and can help you find the information you need or explain it in simple terms. Just ask your questions, and providing more details will help me assist you more effectively!
14 SEERSPLIT SYSTEM HEAT PUMP WITH MICROCHANNEL COILS
T4BE - 018, 024, 030, 036, 042, 048, & 060 (1.5, 2, 2.5, 3, 3.5, 4, & 5 TON) SERIES
SINGLE PHASE MODELS
IMPORTANT
ATTENTION INSTALLERS:
It is your responsibility to know this product better than your customer. This includes being able to install the product
according to strict safety guidelines and instructing the customer on how to operate and maintain the equipment for
the life of the product. Safety should always be the deciding factor when installing this product and using common
sense plays an important role as well. Pay attention to all safety warnings and any other special notes highlighted
in the manual. Improper installation of the furnace or failure to follow safety warnings could result in serious injury,
death, or property damage.
These instructions are primarily intended to assist qualified individuals experienced in the proper installation of this
appliance. Some local codes require licensed installation/service personnel for this type of equipment. Please read all
instructions carefully before starting the installation. Return these instructions to the customer’s package for future
reference.
DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
INSTALLATION INSTRUCTIONS
REFRIGERANT CHARGING ............................................ 9
Charging the Unit in AC Mode ......................................... 9
Application Notes & Charging Charts
(Cooling Mode Only) ....................................................... 10
Figure 6. Charging Chart for 1.5 Ton Models .................10
Figure 7. Charging Chart for 2 Ton Models ....................11
Figure 8. Charging Chart for 2.5 Ton Models .................11
Figure 9. Charging Chart for 3 Ton Models ....................12
Figure 10. Charging Chart for 3.5 Ton Models ...............12
Figure 11. Charging Chart for 4 Ton Models ..................13
Figure 12. Charging Chart for 5 Ton Models ..................13
Refrigerant Charging Tables (Cooling Mode Only) ......... 14
Table 6. Charging Table for 1.5 Ton Models ................... 14
Table 7. Charging Table for 2 Ton Models ...................... 14
Table 8. Charging Table for 2.5 Ton Models ................... 15
Table 9. Charging Table for 3 Ton Models ...................... 15
Table 10. Charging Table for 3.5 Ton Models ................. 16
Table 11. Charging Table for 4 Ton Models .................... 16
Table 12. Charging Table for 5 Ton Models .................... 17
Application Notes & Heat Mode Verification Tables
(Heat Mode Only) ............................................................ 18
Table 13. Verification Table for 1.5 Ton Models .............. 19
Table 14. Verification Table for 2 Ton Models ................. 19
Table 15. Verification Table for 2.5 Ton Models .............. 19
Table 16. Verification Table for 3 Ton Models ................. 19
Table 17. Verification Table for 3.5 Ton Models .............. 20
Table 18. Verification Table for 4 Ton Models ................. 20
Table 19. Verification Table for 5 Ton Models ................. 20
WIRING DIAGRAMS ......................................................... 21
Figure 13. W.D. for 1.5 - 5 Ton Models Equipped
With CoreSense
TM
Diagnostic Module .......... 21
Figure 14. W.D. for 1.5 - 5 Ton Models NOT Equipped
With CoreSense
TM
Diagnostic Module .......... 22
Figure 15. W.D. for 1.5 - 5 Ton Models Equipped with
Low Pressure Switch .................................... 23
INSTALLATION / PERFORMANCE CHECK LIST ........... 24
REPLACEMENT PARTS ................................................... 24
IMPORTANT SAFETY INFORMATION ............................ 2
HEAT PUMP INSTALLATION ........................................... 3
General Information ......................................................... 3
Before You Install the Heat Pump ................................... 3
Locating the Heat Pump .................................................. 3
Packaging Removal ......................................................... 3
Ground Level ................................................................... 3
Rooftop ............................................................................ 3
Connecting Refrigerant Tubing Between the Indoor &
Outdoor Unit .................................................................... 4
Outdoor Orifice Removal & Installation ........................... 4
ELECTRICAL WIRING ...................................................... 5
Pre-Electrical Checklist ................................................... 5
Line Voltage ..................................................................... 5
Grounding ........................................................................ 6
Thermostat / Low Voltage Connections .......................... 6
CoreSense
TM
Diagnostics Module ................................... 6
Compressor Protection .................................................. 7
Resetting Alert Codes ................................................... 7
START UP & ADJUSTMENTS ......................................... 7
Pre-Start Check List ........................................................ 7
Start-Up Procedures ........................................................ 7
Operating Temperatures ................................................ 7
Air Circulation - Indoor Blower ......................................... 8
Short Cycle Protection ..................................................... 8
System Cooling ............................................................... 8
System Heating ............................................................... 8
Defrost Control Board Test Pins ...................................... 8
HEAT PUMP MAINTENANCE .......................................... 8
2
IMPORTANT SAFETY INFORMATION
INSTALLER: Please read all instructions before servicing
this equipment. Pay attention to all safety warnings and
any other special notes highlighted in the manual. Safety
markings are used frequently throughout this manual to
designate a degree or level of seriousness and should not
be ignored. WARNING indicates a potentially hazardous
situation that if not avoided, could result in personal injury
or death. CAUTION indicates a potentially hazardous
situation that if not avoided, may result in minor or moderate
injury or property damage.
WARNING:
ELECTRICAL SHOCK, FIRE OR
EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
 
to the unit.
 
to disconnecting. Reconnect wires correctly.
 
WARNING:
This split system heat pumps is shipped charged
with R410A refrigerant and ready for installation.
If repairs make it necessary for evacuation and
charging, it should only be attempted by qualified
trained personnel thoroughly familiar with this
equipment. Under no circumstances should
the owner attempt to install and/or service this
equipment. Failure to comply with this warning
could result in property damage, personal injury,
or death.
CAUTION:
This unit uses R-410A refrigerant. DO NOT use
any other refrigerant in this unit. Use of another
refrigerant will damage the unit.
WARNING:
Unless noted otherwise in these instructions,
only factory authorized parts or accessory
kits may be used with this product. Improper
installation, service, adjustment, or maintenance
may cause explosion, fire, electrical shock or
other hazardous conditions which may result in
personal injury or property damage.
• Installation of equipment may require brazing
operations. Installer must comply with safety codes
and wear appropriate safety equipment (safety glasses,
work gloves, fire extinguisher, etc.) when performing
brazing operations.
• Followall precautions intheliterature, ontags,and
on labels provided with the equipment. Read and
thoroughly understand the instructions provided with
the equipment prior to performing the installation and
operational checkout of the equipment.
• Usecautionwhenhandlingthisapplianceorremoving
components. Personal injury can occur from sharp
metal edges present in all sheet metal constructed
equipment.
WARNING:
The information listed below and the next page
must be followed during the installation, service,
and operation of this furnace. Failure to follow
safety recommendations could result in possible
damage to the equipment, serious personal injury
or death.
• The installer must comply with all local codes and
regulations which govern the installation of this type
of equipment. Local codes and regulations take
precedence over any recommendations contained in
these instructions. Consult local building codes and the
National Electrical Code (ANSI CI) for special installation
requirements.
• Allelectricalwiringmustbecompletedinaccordance
with local, state and national codes and regulations
and with the National Electric Code (ANSI/NFPA 70)
or in Canada the Canadian Electric Code Part 1 CSA
C.22.1.
• Thisequipmentcontainsliquidandgaseousrefrigerant
under high pressure. DO NOT USE ANY PORTION OF
THE CHARGE FOR PURGING OR LEAK TESTING.
Installation or servicing should only be performed by
qualified trained personnel thoroughly familiar with this
type equipment.
• Fullyannealed,refrigerantgradecoppertubingshould
be used when installing the system. Refrigerant suction
line tubing should be fully insulated.
• Thisunitisdesignedforoutdoorinstallationsonlyand
should be positioned as shown on page 3.
3
HEAT PUMP INSTALLATION
General Information
Split system heat pumps are designed only for outdoor
rooftop or ground level installations. This unit has been
tested for capacity and efficiency in accordance with
AHRI Standards and will provide many years of safe
and dependable comfort, providing it is properly installed
and maintained. Abuse, improper use, and/or improper
maintenance can shorten the life of the appliance and
create unsafe hazards.
To achieve optimum performance and minimize equipment
failure, it is recommended that periodic maintenance be
performed on this unit. The ability to properly perform
maintenance on this equipment requires certain
mechanical skills and tools.
Refer to the Quick Reference Data sheet for additional
electrical, charging and unit information.
Before You Install the Heat Pump
√ The cooling load of the area to be conditioned must be
calculated and a system of the proper capacity selected.
It is recommended that the area to be conditioned be
completely insulated and vapor sealed.
√ Check the electrical supply and verify the power supply
is adequate for unit operation. The system must be wired
and provided with circuit protection in accordance with
local building codes. If there is any question concerning
the power supply, contact the local power company.
√ The indoor section (air handler, furnace, etc) should be
installed before routing the refrigerant tubing. Refer to
the indoor unit's installation instructions for installation
details.
√ All units are securely packed at the time of shipment and
upon arrival should be carefully inspected for damage
prior to installing the equipment at the job site. Verify
coil fins are straight. If necessary, comb fins to remove
flattened or bent fins. Claims for damage (apparent or
concealed) should be filed immediately with the carrier.
√ Please consult your dealer for maintenance information
and availability of maintenance contracts. Please read
all instructions before installing the unit.
Locating the Heat Pump
• Surveythejobsitetodeterminethebestlocationfor
mounting the outdoor unit.
• Overhead obstructions,poorlyventilatedareas,and
areas subject to accumulation of debris should be
avoided. See Figure 1.
• Sufcientclearanceforunobstructedairowthroughthe
outdoor coil must be maintained in order to achieve rated
performance. See Figure 1 for minimum clearances to
obstructions.
• Considerationshouldbegiventoavailabilityofelectric
power, service access, noise, and shade.
Packaging Removal
To prevent damage to the tubing onnections, carefully
remove the carton and user’s manual from the equipment.
Discard the shipping carton.
Ground Level
Ground level installations must be located according to
local building codes or ordinances and these requirements:
• Clearancesmustbeinaccordancewiththoseshown
in Figure 1.
• A suitable mounting pad must be provided and be
separate from the building foundation. The pad must
be level and strong enough to support the unit’s weight.
The slab height must be a minimum of 2” (5 cm) above
grade and with adequate drainage. See Figure 1.
Rooftop
• Themethodofmountingshouldbedesignedsothatit
does not overload roof structures or transmit noise to
the interior of the structure. The roof must be structurally
capable of handling the weight of the unit.
• Full perimeter support is required under the unit.
Support must be made of weather resistant materials
and installed prior to unit installation.
• Thesupportmustbebuilttoraisetheunit6"abovethe
roof.
Figure 1. Clearance Requirements
6"
24" for
Service Access
12" See
Note
12"
See Note
DO NOT
OBSTRUCT
TOP OF UNIT
NOTE: Units require full perimeter clearances. Installer must maintain
18” between two units or 12” between single unit and structure.
Building or Structure
2”
48”
4
Connecting Refrigerant Tubing Between
the Indoor & Outdoor Unit
CAUTION:
When servicing, cover or seal openings to
minimize the exposure of the refrigerant system
to air to prevent accumulation of moisture and
other contaminants.
After outdoor and indoor unit placement has been
determined, route refrigerant tubing between the
equipment in accordance with sound installation practices.
• When connecting refrigerant linesets together, it is
recommended that dry nitrogen be flowing through the
joints during brazing. This will prevent internal oxidation
and scaling from occurring.
• Refrigeranttubingshouldberoutedinamannerthat
minimizes the length of tubing and the number of bends
in the tubing.
• Refrigeranttubingshouldbesupportedinamanner
that the tubing will not vibrate or abrade during system
operation.
• Tubingshouldbekeptcleanofforeigndebrisduring
installation.
• Everyeffortshouldbemadebytheinstallertoensure
that the field installed refrigerant containing components
of the system have been installed in accordance with
these instructions and sound installation practices to
insure reliable system operation and longevity.
• The maximum recommended interconnecting
refrigerant line length is 75 feet, and the vertical elevation
difference between the indoor and outdoor sections
should not exceed 20 feet.
• If precise forming of refrigerant lines is required, a
copper tubing bender is recommended. Avoid sharp
bends and contact of the refrigerant lines with metal
surfaces.
• A lter dryer is provided with the unit and must be
installed in the liquid line of the system. If the installation
replaces a system with a filter dryer already present
in the liquid line, the filter dryer must be replaced with
the one supplied with the unit. The filter dryer must be
installed in strict accordance with the manufacturer’s
installation instructions.
• Optionalequipmentsuchasliquidlinesolenoidvalves,
low ambient, etc., should be installed in strict accordance
with the manufacturer’s installation instructions.
Outdoor Orifice Removal & Installation
The orifice installed in the outdoor unit has been sized
for use with the most popularly matched indoor units.
Depending on the indoor coil that the unit is being matched
with, the outdoor restrictor may need to be changed. Please
refer to the Quick Reference Data sheet that is supplied
with the outdoor unit for more information.
If the outdoor unit has the liquid valve shown in Figure
2, then the restrictor is located inside the swivel nut
connection of the liquid valve and not inside the outdoor
unit’s distributor. Perform steps 1 - 5 if the outdoor restrictor
needs to be changed.
CAUTION:
When servicing, cover or seal openings to
minimize the exposure of the refrigerant system
to air to prevent accumulation of moisture and
other contaminants.
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. Do not over tighten!
1. Using two wrenches loosen the nut and liquid valve.
Turn the assembly nut counter-clockwise until the orifice
body halves are separated.
Liquid
Valve
Restrictor
Swivel Nut
Figure 2. 
Swivel Nut Adapter
Figure 3. Removal of Orifice
5

• Awiringdiagramislocatedontheinsidecoverofthe
electrical box of the outdoor unit. The installer should
become familiar with the wiring diagram before making
any electrical connections to the outdoor unit.
• An electrical disconnect must be located within
sight of and readily accessible to the unit. This
switch shall be capable of electrically de-energizing
the outdoor unit.
• Line voltage to the unit should be supplied from a
dedicated branch circuit containing the correct fuse
or circuit breaker for the unit. Incoming field wiring
and minimum size of electrical conductors and circuit
protection must be in compliance with information listed
on the outdoor unit data label. Any other wiring methods
must be acceptable to authority having jurisdiction.
• Theoutdoorunitrequiresbothpowerandcontrolcircuit
electrical connections. Refer to the wiring diagrams
(Figure 13, Figure 14, & Figure 15) for identification and
location of outdoor unit field wiring interfaces. Make all
electrical connections in accordance with all applicable
codes and ordinances.
• Overcurrentprotectionmustbeprovidedatthebranch
circuit distribution panel and sized as shown on the unit
rating label and according to applicable local codes.
See the unit rating plate for minimum circuit ampacity
and maximum overcurrent protection limits.
• Providepowersupplyfortheunitinaccordancewiththe
unit wiring diagram, and the unit rating plate. Connect
the line-voltage leads to the terminals on the contactor
inside the control compartment.
• Useonlycopperwireforthelinevoltagepowersupply
to this unit as listed in Table 1. Use proper code agency
listed conduit and a conduit connector for connecting
the supply wires to the unit. Use of rain tight conduit is
recommended.
• 208/230Voltunitsareshippedfromthefactorywired
for 230 volt operation. For 208V operation, remove the
lead from the transformer terminal marked 240V and
connect it to the terminal marked 208V.
2. Insert a light-gauge wire hook between the valve body
and the restrictor orifice while being careful not to scratch
either part. Carefully remove the restrictor orifice from
the valve body. See Figure 3 (page 4).
3. Check the actual size of the new orifice. NOTE: The
size is stamped on its side. Do not use pin gauges to
measure the orifice diameter.
4. Insert the new orifice into the valve body, with the
rounded end facing into the valve. See Figure 2 (page
4).
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. Do not over tighten!
5. Realign the assembly nut on the valve body and hand
tighten both components. Mark a line on both bodies and
then tighten an additional ¼ turn using two wrenches.
The movement of the two lines will show how much the
nut is tightened.
ELECTRICAL WIRING
WARNING:
To avoid risk of electrical shock, personal
injury, or death, disconnect all electrical power
to the unit before performing any maintenance
or service. The unit may have more than one
electrical supply.
Label all wires prior to disconnection when
servicing the unit. Wiring errors can cause
improper and dangerous operation.
• Allelectricalconnectionsmustbeincompliancewith
all applicable local codes and ordinances, and with the
current revision of the National Electric Code (ANSI/
NFPA 70).
• ForCanadianinstallationstheelectricalconnections
and grounding shall comply with the current Canadian
Electrical Code (CSA C22.1 and/or local codes).
Pre-Electrical Checklist
√ Verify that the voltage, frequency, and phase of the
supply source match the specifications on the unit
rating plate.
√ Verify that the service provided by the utility is sufficient
to handle the additional load imposed by this equipment.
Refer to the unit wiring label for proper high and low
voltage wiring.
√ Verify factory wiring is in accordance with the unit wiring
diagram. Inspect for loose connections. See Figure 13
(page 21), Figure 14 (page 22), & Figure 15 (page
23).
COPPER WIRE SIZE — AWG

SUPPLY WIRE LENGTH-FEET
SUPPLY
CIRCUIT
AMPACITY200 150 100 50
6 8 10 14 15
4 6 8 12 20
4 6 8 10 25
4 4 6 10 30
3 4 6 8 35
3 4 6 8 40
2 3 4 6 45
2 3 4 6 50
2 3 4 6 55
1 2 3 4 60
Wire Size based on N.E.C. for 60° type copper conductors.
Table 1. Copper Wire Size
6
G
RW2
C
E
O
Y
Thermostat
Green
Red
White
G
R
Black
O
Y1 IN
R
C
Air Handler
Heat Pump
(OD Section)
C
W
W2 OUT
W2 IN
Figure 4. Typical Thermostat Connections
• Optionalequipmentrequiringconnectiontothepower
or control circuits must be wired in strict accordance
of the NEC (ANSI/NFPA 70), applicable local codes,
and the instructions provided with the equipment.
Grounding
WARNING:
The unit cabinet must have an uninterrupted or
unbroken electrical ground to minimize personal
injury if an electrical fault should occur. Do not
use gas piping as an electrical ground!
This unit must be electrically grounded in accordance
with local codes or, in the absence of local codes, with
the National Electrical Code (ANSI/NFPA 70) or the CSA
C22.1 Electrical Code. Use the grounding lug provided in
the control box for grounding the unit.

• Thermostatconnectionsshouldbemadeinaccordance
with the instructions supplied with the thermostat and
the indoor equipment. A typical installation with a heat
pump thermostat and air handler is shown in Figure 4.
• Theoutdoorunitisdesignedtooperatefroma24VAC
Class II control circuit. The control circuit wiring must
comply with the current provisions of the NEC (ANSI/
NFPA 70) and with applicable local codes having
jurisdiction.
• Thelowvoltagewiresmustbeproperlyconnectedto
the units low voltage terminal block. Recommended
wire gauge and wire lengths for typical thermostat
connections are listed in Table 2.
• The thermostat should be mounted about 5 feet
above the floor on an inside wall. DO NOT install the
thermostat on an outside wall or any other location
where its operation may be adversely affected by radiant
heat from fireplaces, sunlight, or lighting fixtures, and
convective heat from warm air registers or electrical
appliances. Refer to the thermostat manufacturer’s
instruction sheet for detailed mounting and installation
information.
CoreSense
TM
Diagnostics Module
(Select Models Only)
The CoreSense
TM
Diagnostics Module, Figure 5 (page
6), is a breakthrough innovation for troubleshooting
heat pump and air conditioning system failures. The module
installs easily in the electrical box of the outdoor unit
near the compressor contactor.By using the compressor
as a sensor, CoreSense Diagnostics helps the service
technician more accurately troubleshoot system and
compressor fault conditions.
A flashing LED indicator communicates the ALERT code
and a diagnostic key is also imprinted on the side of the
module to quickly direct the technician to the root cause
of a problem. Alert identification codes are also listed in
Table 4 (page 7).
Table 2. Thermostat Wire
THERMOSTAT
WIRE GAUGE
MAXIMUM RECOMMENDED
THERMOSTAT WIRE LENGTH (FT)
24 25
22 45
20 70
18 110
Figure 5. CoreSense
TM
Diagnostics Module
Compressor
Common Wire
Reset Button
Tr ip / Lock
(Red LED)
Run / Alert
(Yellow LED)
7
Compressor Protection
The CoreSense
TM
Diagnostics module utilizes proprietary
algorithms to protect the compressor and system from
repeated trips of system pressure controls and the
compressor internal overload. The protection terminal
of the module should be wired in series with the system
low pressure and high pressure cutouts, as well as the
compressor contactor. When the module detects a series
of trips as described below, it will activate a lockout feature
that opens the normally closed protection contacts in
the module, thereby cutting power to the contactor and
shutting off the compressor.
Resetting Alert Codes
When the CoreSense
TM
Diagnostics module has detected a
series of adverse conditions that have caused it to lockout
the compressor, and after the issue has been resolved,
it is necessary to manually reset the module in order to
clear the present alert code.
The primary way of clearing the code and resetting the
alert is to press the reset button located on the module.
NOTE: Pressing the reset will require a pin or a mini
electronics screwdriver. This button must be pressed and
held for a minimum of one second for the module to be
reset. Pressing the reset button clears the immediate lock
code and the seven day operating history. It will not clear
the permanent module history. In the case of the three-
wire module, the codes can be reset or cleared by cycling
power to the module. This can be done by disengaging
the Common (C) terminal. This will not clear the seven
day operating history.
START UP & ADJUSTMENTS
Pre-Start Check List
√ Verify the unit is level and has sufficient clearances for
unobstructed airflow.
√ Verify the outdoor coil and top of the unit are free from
obstructions and debris, and all equipment access/
control panels are in place.
√ Verify that the line voltage power leads are securely
connected and the unit is properly grounded.
√ Verify that the low voltage wires are securely connected
to the correct leads on the low voltage terminal strip.
√ Verify that the power supply branch circuit overcurrent
protection is sized properly.
√ Verify that the thermostat is wired correctly.
Start-Up Procedures
WARNING:
This unit is equipped with a crankcase heater.
Allow 24 hours prior to continuing the start up
procedures to allow for heating of the refrigerant
compressor crankcase. Failure to comply may
result in damage and could cause premature
failure of the system. This warning should be
followed at initial start up and any time the power
has been removed for 12 hours or longer.
Operating Temperatures
This equipment has been designed to operate within the
temperatures specified in Table 3. Running the equipment
in heating at higher than 70°F may require the use of a
Heat Pump Mild Weather Control Kit or changing over to
emergency or auxiliary heating.
Table 3. Heat Pump Operating Temperatures
COOLING HEATING
MIN (°F) MAX (°F) MIN (°F) MAX (°F)
60 115 -10 70
ALERT CODE ALERT CONDITION  LOCK INDICATION
Normal Run
Solid Yellow
Normal operation, no trip N/A N/A
Code1
Yellow Flash 1
Long run time. Compressor is on running for more than 18 hours.
(Code1 is disabled in Heat Pump Mode)
N/A N/A
Code2
Yellow Flash 2
Compressor (pressure) trip. Compressor runs for 12 sec to 15 min followed
by a compressor trip condition lasting for more than 7 min.
4x consecutive
Red: Flash2
Yellow: Off
Code3
Yellow Flash 3
Pressure switch cycling. Compressor runs for 12 sec to 15 min followed
by a compressor trip lasting between 35 sec to 7 min.
4x consecutive
or 10x total
Red: Flash3
Yellow: Off
Code4
Yellow Flash 4
Locked rotor. Compressor trips within a compressor run time of 12 sec
and does not start within 35 sec.
10x consecutive
Red: Flash4
Yellow: Off
Code5
Yellow Flash 5
Compressor (moderate run) trip. Compressor runs for 15 min to 18 hrs
followed by a compressor trip lasting longer than 7 min.
4x consecutive
or 10x total
Red: Flash5
Yellow: Off
Code9
Red Flash 9
The current to the PROT terminal is greater than 2A.
Current >2A
for 40ms
Red: Flash9
Yellow: Off
Trip
Solid Red
Demand is present, but compressor is not running. N/A N/A
Table 4. LED Diagnostics for CoreSense
TM
Diagnostics Module
8
Air Circulation - Indoor Blower
1. Set the thermostat system mode on OFF and the fan
mode to ON.
2. Verify the blower runs continuously. Check the air delivery
at the supply registers and adjust register openings for
balanced air distribution. If insufficient air is detected,
examine ductwork for leaks or obstructions.
3. Set the thermostat fan mode to AUTO and verify the
blower stops running.
Short Cycle Protection
1. Set the thermostat system mode to COOL. Observe the
temperature setting of the thermostat and gradually raise
the set-point temperature until the unit de-energizes.
2. Immediately lower the set point temperature of the
thermostat to its original setting and verify that the
indoor blower is energized and outdoor unit remains
de-energized.
3. After approximately 5 minutes, verify the outdoor unit
energizes and the temperature of the discharge air is
cooler than the room temperature.
System Cooling
1. Set the thermostat’s system mode to COOL and the
fan mode to AUTO. Gradually lower the thermostat
temperature setpoint below room temperature and
verify the outdoor unit and indoor blower energize.
2. Verify blower wheel is spinning in direction indicated by
arrow. Feel the air being circulated by the indoor blower
and verify that it is cooler than ambient temperature.
Listen for any unusual noises. If unusual sounds occur,
determine the source of the noise and correct as
necessary.
3. Verify HI and LO refrigerant pressures.
4. Allow the system to operate for several minutes and then
set the temperature selector above room temperature.
Verify the fan and compressor cycle off with the
thermostat. NOTE: The blower should also stop unless
fan switch is set to the ON position.
System Heating
1. Set the thermostat's system mode to HEAT and the
temperature mode to below room temperature.
2. Verify the outdoor unit and indoor fan stop running. After
5 minutes, increase the temperature on the thermostat
to it's maximum setting.
3. Verify the outdoor unit and indoor blower energize. Feel
the air being circulated by the indoor blower and verify
that it is warmer than ambient temperature. Listen for
any unusual noises. If unusual sounds occur, determine
the source of the noise and correct as necessary.
Defrost Control Board Test Pins
• Placingajumperbetweenthetestpinsforlessthan1
second will bypass the Anti-Short Cycle Timer.
• Placingajumperbetweenthetestpinsformorethan1
second will force the unit into a defrost cycle. As soon
as the jumper is removed, the defrost cycle will end
as determined by the typical criteria.
STATUS
INDICATOR
STATUS
TYPE
DIAGNOSTIC
DESCRIPTION
C1
Operating Status Cooling, 1st Stage
H1
Operating Status Heating, 1st Stage
SC
Operating Status Anti Short Cycle Timer
OF
Operating Status Defrost
_.
Operating Status Power on, no call for operation
01
Fault Pressure switch, low
02
Fault Pressure switch, high
03
Fault Temperature Sensor, Ambient
04
Fault Temperature Sensor, Coil
05
Fault Board
OF
(FLASHING)
Input Error
Forced defrost - test short
applied longer than 11 minutes
Table 5. Defrost Control Board Status Indicators
• Verify the Status Indicator (on the control board)
against the codes listed in Table 5 to determine proper
diagnostic description.
HEAT PUMP MAINTENANCE
WARNING:
To prevent electrical shock, personal injury, or
death, disconnect all electrical power to the unit
before performing any maintenance or service.
The unit may have more than one electrical
supply.
Proper maintenance is important to achieve optimum
performance from the heat pump. The ability to properly
perform maintenance on this equipment requires certain
mechanical skills and tools. If you do not possess these
skills, contact your dealer for maintenance. Consult your
local dealer about the availability of maintenance contracts.
Routine maintenance should include the following:
• Inspectandcleanorreplaceairltersatthebeginning
of each heating and cooling season, or more frequently
if required.
• Inspecttheoutdoorcoilatthebeginningofeachcooling
season. Remove any debris. Clean the outdoor coil
and louvers as necessary using a mild detergent and
water. Rinse thoroughly with water.
• Inspecttheelectricalconnectionsfortightnessatthe
beginning of each heating and cooling season. Service
as necessary.
CAUTION:
The unit should never be operated without a
filter in the return air system. Replace disposable
filters with the same type and size.
9
• Donotaddadditionaloiltomotorsunequippedwithoil
tubes. The compressor is hermetically sealed at the
factory and does not require lubrication.
REFRIGERANT CHARGING
WARNING:
This split system heat pump is shipped charged
with R410A refrigerant and ready for installation.
If repairs make it necessary for evacuation and
charging, it should only be attempted by qualified
trained personnel thoroughly familiar with this
equipment. Under no circumstances should
the owner attempt to install and/or service this
equipment. Failure to comply with this warning
could result in property damage, personal injury,
or death.
After refrigerant line connections are completed, it is
required that you leak check and evacuate the indoor
section and all line connections (using proper methods)
before finalizing the full system refrigerant charge.
• Toachieveratedcapacityandefciency,thecompressor
must be exposed to refrigerant for at least 24 hours
prior to running and then the compressor must be run
for a minimum of 12 hours.
• Coolingmodechargingchartsandtablesareapplicable
only to matched assemblies of this equipment and listed
airflows for the indoor coil. Refer to the Quick Reference
Data sheet for additional charging information.
Outdoor units with non-AHRI listed indoor coils are not
recommended and deviations from rated airflows or
non-listed combinations may require modification to the
expansion device and refrigerant charging procedures
for proper and efficient system operation. For correct
system charging, refer to Figure 6 (page 10), Figure
7 (page 11), Figure 8 (page 11), Figure 9 (page
12), Figure 10 (page 12), Figure 11 (page 13),
& Figure 12 (page 13) and Table 6 (page 14),
Table 7 (page 14), Table 8 (page 15), Table 9
(page 15), Table 10 (page 16), Table 11 (page
16), & Table 12 (page 17).
• Therefrigerantchargecanbecheckedandadjusted
through the service ports provided external to the
outdoor unit. Use only gage line sets which have a
“Schrader” depression device present to actuate the
valve. A common suction port for heating mode charging
is included and located on the compressor access panel
above the outdoor unit service valves.
• HeatModeVericationTablesareprovidedforquick
reference when the unit is in heating mode and for the
inspection of the liquid line pressures and temperatures.
See Table 13 (page 19), Table 14 (page 19), Table
15 (page 19), Table 16 (page 19), Table 17 (page
20), Table 18 (page 20), & Table 19 (page 20).
• Ahigh-pressureswitchisfactory-installedandlocated
in the compressor discharge line internal to the
outdoor unit. The switch is designed to de-energize
the system when very high pressures occur during
abnormal conditions. Under normal conditions, the
switch is closed. If the discharge pressure rises above
575 psig, then the switch will open and de-energize
the outdoor unit. The switch will close again once the
liquid pressure decreases to 460 psig. Please note that
the switch interrupts the thermostat inputs to the unit.
When the switch opens and then closes, there will be
a 5 minute short cycling delay before the outdoor unit
will energize.
Charging the Unit in AC Mode
(With Outdoor Temperatures Above 55° F for Optimized
Sub-Cooling of 10° F to 12° F)
1. With the system operating at steady-state, measure the
liquid refrigerant pressure (in psig) at the outdoor unit
service valve.
2. Measure the liquid refrigerant temperature (in
Fahrenheit) at the service valve.
3. Determine the required liquid refrigerant pressure from
Figure 6, Figure 7, Figure 8, Figure 9, Figure 10, Figure
11, & Figure 12.
• IfthepressuremeasuredinStep1isgreaterthan
the required liquid refrigerant pressure determined in
Step 3, then there is too much charge in the system.
Remove refrigerant and repeat Steps 1 through 3
until the system is correctly charged.
• IfthepressuremeasuredinStep1islessthanthe
required liquid refrigerant pressure determined in
Step 3, there is too little charge in the system. Add
refrigerant and repeat Steps 1 through 3 until the
system is correctly charged.
10
Application Notes & Charging Charts (Cooling Mode Only)
• This equipment’s cooling system contains refrigerant under high pressure. Always use safe and
environmentally sound methods when handling refrigerant handling or servicing the unit. Review the
factory literature and safety warnings prior to servicing.
• Whenrepairingsystemleaks,alwaysuseanitrogen(inert)gastoprotecttherefrigerantsystemandpressure
check the repair before re-charging. Always replace the filter-dryers when performing any repair to the refrigeration
system with one capable of acid removal. After completing the repairs, evacuate the system to 350 - 500 microns
and weigh in the refrigerant to the amount specified on the unit rating label.
• Chargingchartsarevalidforavarietyofindoor,returnairconditionsandaremostinuencedbytheoutdoor
ambient temperature, outdoor fan operation and the unit operating voltage. Before using these charts, make sure
the unit is in a stable operating mode. As shown in the charging charts: Figure 6, Figure 7 (page 11), Figure
8 (page 11), Figure 9 (page 12), Figure 10 (page 12), Figure 11 (page 13), & Figure 12 (page 13),
the ideal system sub-cooling can vary over the range of operation. Reference the charts to determine the ideal
amount of sub-cooling for a given liquid pressure. Units charged to other values will not perform at the rated unit
efficiency (EER) or rated Coefficient of Performance (COP) in heating mode.
• Toinspectasystemsoperationusingqualityinstruments,matchthemeasuredliquidtemperaturetotheunits
chart. The measured liquid pressure reading should be within 3% of the charts value for most installations.
• Forsystemsthatareoperatingwithmorethana5%deviation,inspecttheunitforthepropervoltageandphase
balance and the refrigeration system for leaks.
• Unitsthatareoperatingatlessthen95%ofthenominalvoltageorwitha2%phaseimbalancemayseeamore
significant deviation than the amount stated above.
• DO NOT use the charts in systems that have a fan cycling under low-ambient control. Refer to the low-ambient
kit instructions for more information. (If applicable)
Figure 6. Charging Chart for 1.5 Ton Models

200
220
240
260
280
300
320
340
360
380
400
420
440
460
480
500
520
540
560
580
600
75 80 85 90 95 100 105110 115 120 125130 135
1 1/2 Ton Charging Chart - Cooling
Liquid Temperature (
0
F)
Liquid Pressure (psig)
Remove refrigerant when above the curve
Add refrigerant when below the curve
11
Figure 7. Charging Chart for 2 Ton Models

200
220
240
260
280
300
320
340
360
380
400
420
440
460
480
500
520
540
560
580
600
75 80 85 90 95 100 105110 115120 125 130 135
2 Ton Charging Chart - Cooling
Liquid Temperature (
0
F)
Liquid Pressure (psig)
Remove refrigerant when above the curve
Add refrigerant when below the curve
200
220
240
260
280
300
320
340
360
380
400
420
440
460
480
500
520
540
560
580
600
75 80 85 90 95 100 105110 115 120 125130 135
2 1/2 Ton Charging Chart - Cooling
Liquid Temperature (
0
F)
Liquid Pressure (psig)
Remove refrigerant when above the curve
Add refrigerant when below the curve
Figure 8. Charging Chart for 2.5 Ton Models

12
200
220
240
260
280
300
320
340
360
380
400
420
440
460
480
500
520
540
560
580
600
75 80 85 90 95 100 105110 115120 125130 135
3 Ton Charging Chart - Cooling
Liquid Temperature (
0
F)
Liquid Pressure (psig)
Remove refrigerant when above the curve
Add refrigerant when below the curve
Figure 9. Charging Chart for 3 Ton Models

200
220
240
260
280
300
320
340
360
380
400
420
440
460
480
500
520
540
560
580
600
75 80 85 90 95 100105 110115 120 125 13
01
35
Liquid Temperature (
0
F)
Liquid Pressure (psig)
Remove refrigerant when above the curve
Add refrigerant when below the curve
3.5 Ton Charging Chart - Cooling
Figure 10. Charging Chart for 3.5 Ton Models

13
200
220
240
260
280
300
320
340
360
380
400
420
440
460
480
500
520
540
560
580
600
75 80 85 90 95 100 105110 115120 125130 135
4 Ton Charging Chart - Cooling
Liquid Temperature (
0
F)
Liquid Pressure (psig)
Remove refrigerant when above the curve
Add refrigerant when below the curve
Figure 11. Charging Chart for 4 Ton Models

200
220
240
260
280
300
320
340
360
380
400
420
440
460
480
500
520
540
560
580
600
75 80 85 90 95 100 105 110 115 120125 13
01
35
5 Ton Charging Chart - Cooling
Liquid Temperature (
0
F)
Liquid Pressure (psig)
Remove refrigerant when above the curve
Add refrigerant when below the curve
Figure 12. Charging Chart for 5 Ton Models

14
T4BE-018KA SERIES
SUCT.
PRESS.
OUTDOOR TEMPERATURE (°F)
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
137 222 110
139
223 110
244 115
141 225 110
245 115
266 121
143
227 111
246 116
267 121
288 126
145 227 111
248 116
268 121
289 126
309 132
147 248 116
269 121
289 126
310 132
331 137
149 270 121
290 126
311 131
331 137
352 142
151 292 127
312 132
332 137
353 142
373 147
153 293 127 313 132
334 137
353 142
374 147
155 315 132 335 137
356 142
374 147
157 337 137 358 142
378 147
159 360 142 380 147
161 382 146
163
Table 6. Charging Table for 1.5 Ton Models
(Restrictor Matches)
T4BE-024KA SERIES
SUCT.
PRESS.
OUTDOOR TEMPERATURE (°F)
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
133 234 114
135
236 115
255 120
137 238 115
257 120
276 125
139
240 116
259 121
278 126
297 131
141 242 116
261 121
280 126
299 131
318 136
143 263 122
282 127
301 132
320 137
339 142
145 285 128
304 132
323 137
341 143
360 148
147 306 133
325 138
344 143
363 148
381 153
149 308 134 327 138
346 143
365 148
384 154
151 330 139 349 144
368 149
387 154
153 351 144 370 149
389 154
155 373 150 392 155
157 395 155
159
Table 7. Charging Table for 2 Ton Models
(Restrictor Matches)
Refrigerant Charging Tables (Cooling Mode Only)
Shaded boxes indicate flooded conditions.
Rated design values. The suction pressure will vary from design value if indoor air flow, entering dry
bulb, or entering wet bulb temperatures are lower than design.
1. All pressures are listed in psig and all temperatures in ° F
2. Discharge temperatures greater than charted values indicate an undercharged system.
3. In Cooling Mode, suction pressure will be lower than design value if indoor air flow, entering dry bulb, or entering
wet bulb temperatures are lower than design.
4. In Heating Mode, charge should be weighed in. It is strongly recommended to verify charge in cooling mode
at ambient above 70°F.
15
T4BE-036KA SERIES
SUCT.
PRESS.
OUTDOOR TEMPERATURE (°F)
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
133 242 128
135
245 128
265 132
137 247 129
268 132
288 136
139
250 129
270 133
290 136
311 140
141 252 130
272 133
293 137
313 140
334 144
143 275 134
295 137
315 141
336 144
356 148
145 297 138
318 141
338 145
358 148
379 152
147 320 141
340 145
361 149
381 152
402 156
149 323 142 343 145
363 149
383 152
404 156
151 345 146 365 149
386 153
406 156
153 368 149 388 153
408 156
155 390 153 411 157
157 413 157
159
Table 9. Charging Table for 3 Ton Models
(Restrictor Matches)
T4BE-030KA SERIES
SUCT.
PRESS.
OUTDOOR TEMPERATURE (°F)
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
135 242 131
137
243 132
265 135
139 244 132
266 135
287 138
141
245 132
266 135
288 138
310 141
143 246 132
267 135
289 138
310 141
332 144
145 268 135
290 138
311 141
333 144
354 148
147 290 138
312 141
334 144
355 147
377 151
149 313 141
335 144
356 147
378 151
399 154
151 314 141 335 144
357 147
379 150
400 154
153 336 144 358 147
379 150
401 153
155 359 147 380 150
402 153
157 381 150 403 153
159 404 153
161
Table 8. Charging Table for 2.5 Ton Models
(Restrictor Matches)
Shaded boxes indicate flooded conditions.
Rated design values. The suction pressure will vary from design value if indoor air flow, entering dry
bulb, or entering wet bulb temperatures are lower than design.
1. All pressures are listed in psig and all temperatures in ° F
2. Discharge temperatures greater than charted values indicate an undercharged system.
3. In Cooling Mode, suction pressure will be lower than design value if indoor air flow, entering dry bulb, or entering
wet bulb temperatures are lower than design.
4. In Heating Mode, charge should be weighed in. It is strongly recommended to verify charge in cooling mode
at ambient above 70°F.
16
T4BE-042KA SERIES
SUCT.
PRESS.
OUTDOOR TEMPERATURE (°F)
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
132 226 132
134
231 133
250 136
136 235 134
254 137
273 140
138
240 135
258 138
277 141
297 144
140 242 135
262 138
281 141
300 145
320 148
142 265 139
284 142
303 145
323 148
343 152
144 288 143
307 146
326 149
345 152
365 156
146 310 146
329 149
348 152
368 156
388 160
148 314 147 333 150
352 153
370 156
390 160
150 337 150 356 153
375 157
392 159
152 360 154 379 157
398 160
154 384 158 402 161
156 407 161
158
Table 10. Charging Table for 3.5 Ton Models
(Restrictor Matches)
T4BE-048KA SERIES
SUCT.
PRESS.
OUTDOOR TEMPERATURE (°F)
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
132 248 128
134
248 128
269 133
136 248 128
269 133
290 137
138
248 128
269 133
290 137
310 141
140 249 129
269 133
290 137
311 141
331 146
142 270 133
290 137
311 141
332 146
352 150
144 291 137
311 141
332 146
353 150
373 155
146 312 141
332 146
353 150
373 154
394 159
148 312 141 332 145
353 150
374 154
394 159
150 333 145 353 150
374 154
395 158
152 354 150 374 154
395 158
154 375 154 395 158
156 396 158
158
Table 11. Charging Table for 4 Ton Models
(Restrictor Matches)
Shaded boxes indicate flooded conditions.
Rated design values. The suction pressure will vary from design value if indoor air flow, entering dry
bulb, or entering wet bulb temperatures are lower than design.
1. All pressures are listed in psig and all temperatures in ° F
2. Discharge temperatures greater than charted values indicate an undercharged system.
3. In Cooling Mode, suction pressure will be lower than design value if indoor air flow, entering dry bulb, or entering
wet bulb temperatures are lower than design.
4. In Heating Mode, charge should be weighed in. It is strongly recommended to verify charge in cooling mode
at ambient above 70°F.
17
T4BE-060KA SERIES
SUCT.
PRESS.
OUTDOOR TEMPERATURE (°F)
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
121 244 135
123
245 135
267 141
125 246 135
268 141
290 147
127
247 136
269 142
291 147
313 154
129 248 136
270 142
292 148
314 154
336 160
131 271 142
293 148
315 154
337 160
359 166
133 295 148
317 154
338 160
360 166
382 172
135 318 154
340 160
362 166
383 172
405 178
137 319 154 341 160
363 166
385 172
406 178
139 342 160 364 166
386 172
408 178
141 365 166 387 172
409 178
143 388 172 410 178
145 411 178
147
Table 12. Charging Table for 5 Ton Models
(Restrictor Matches)
Shaded boxes indicate flooded conditions.
Rated design values. The suction pressure will vary from design value if indoor air flow, entering dry
bulb, or entering wet bulb temperatures are lower than design.
1. All pressures are listed in psig and all temperatures in ° F
2. Discharge temperatures greater than charted values indicate an undercharged system.
3. In Cooling Mode, suction pressure will be lower than design value if indoor air flow, entering dry bulb, or entering
wet bulb temperatures are lower than design.
4. In Heating Mode, charge should be weighed in. It is strongly recommended to verify charge in cooling mode
at ambient above 70°F.
18

 
charging charts prior to using these Heating-mode
charge verification charts. Always use safe and
environmentally sound methods when handling
refrigerant handling or servicing the unit. Review
the factory literature and safety warnings prior to
servicing.
• Whenrepairingsystemleaks,alwaysuseanitrogen
(inert) gas to protect the refrigerant system and pressure
check the repair before re-charging. Always replace
the filter-dryers when performing any repair to the
refrigeration system with one capable of acid removal.
After completing the repairs, evacuate the system to
350 - 500 microns and weigh in the refrigerant to the
amount specified on the unit rating label.
• Before using the heat mode verification tables,
determine the outdoor ambient temperature and the
return air temperature to the unit. Locate the appropriate
location on the units verification chart based on those
measurements to determine the ideal discharge
pressure and temperature. See Table 13 (page 19),
Table 14 (page 19), Table 15 (page 19), Table 16
(page 19), Table 17 (page 20), Table 18 (page
20), & Table 19 (page 20).. Verify the outdoor
fan and compressor are running and the outdoor coil
is free from frost accumulation. Also verify the system
is not operating in defrost mode before inspecting the
system.
• Alwaysusequalityinstrumentsthatareingoodworking
order to measure the actual operating point of the
refrigeration system. The discharge temperature should
be within 2 degrees of the ideal value and the pressure
should be within 2%.
• Themostreliablewayofverifyingthesystemisatthe
correct charge is to evacuate the system and weigh
in the charge to the amount shown on the rating label.
However, if an inspection with these verification charts
does not line up with the values shown and the ambient
temperature is above 50˚ F, then a more accurate
way to inspect the system for proper charge is with
the cooling mode charging charts. Switch the unit into
cooling mode and allow it to operate and stabilize for
a few minutes then inspect the unit operation with the
cooling mode charts and procedures.
Before changing the unit charge, always inspect
the following items first:
1. Inspect the liquid line temperature on the inlet and outlet
of the filter dryers. If it is the factory dryer and in good
condition there should be no temperature difference.
If the temperature difference is larger than 5˚, replace
the filter dryer with one that is bi-directional and has
acid removal capability. Refer to the unit RPL for the
recommended part number and size.
2. Inspect the units input voltage. Units operating at less
than 95% of the nominal voltage may deviate more from
the chart then previously stated.
3. Inspect the input voltage for a phase imbalance. Units
with greater then a 2% disparity will not operate at the
rated performance.
4. Verify that the unit filters are installed and are clean.
The pressure drop across the filters should not exceed
0.08 in-W.C.
5. Inspect the indoor coil, indoor blower and blower motor
for cleanliness, clogging, and proper operation.
6. Inspect the system for leaks. If any leaks are detected,
repair them immediately. Re-inspect the return air and
ambient temperatures and verify that the correct system
point on the verification chart was selected.
DO NOT use the charts in systems that have the fan cycling
under a low-ambient control. Low-ambient controls are
for cooling operation. In heating mode, the low ambient
control should be disabled. Unless the unit is in defrost
mode, the outdoor fan should always operate in conjunction
with the compressor.
IMPORTANT NOTE:
If the unit is equipped with a liquid valve with an
outdoor restrictor as shown in Figure 2 (page 4),
then it is not possible to measure the liquid pressure.
To approximate the liquid pressure, subtract 7 psig
from the discharge pressure.
Shaded boxes indicate flooded conditions.
Rated design values. The suction pressure will vary from design value if outdoor air flow, entering dry
bulb, or entering wet bulb temperatures vary.
1. All pressures are listed in psig and all temperatures in ° F
2. Discharge temperatures greater than charted values indicate an undercharged system.
19
Table 13. 
OUTDOOR TEMPERATURE (DEG. F)
0 10 20 30 40 50 60
SUC.
PRESS
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
32 201 202 112 48 226 227 119 63 252 252 126 79 277 278 133 97 289 289 141 116 310 310 150 135 331 332 158
33 208 209 110 49 232 233 117 64 256 257 124 80 281 281 131 98 296 296 138 117 317 317 145 136 338 339 152
34
215 216 108
50
238 239 115
65
261 262 122
81
284 285 129
99
303 303 136
118
324 324 141
137
345 346 146
35 222 223 106 51 244 245 113 66 266 267 120 82 288 289 127 100 310 310 133 119 331 331 136 138 352 353 139
36
229 230 104
52
250 251 111
67
271 271 118
83
292 292 125
101
317 317 130
120
338 338 132
139
359 360 133
37 236 237 102 53 256 256 109 68 276 276 116 84 295 296 123 102 324 324 127 121 345 345 127 140 366 367 127
38 243 244 100 54 262 262 107 69 280 281 114 85 299 300 121 103 331 331 124 122 352 352 123 141 373 374 121
Table 14. 
OUTDOOR TEMPERATURE (DEG. F)
0 10 20 30 40 50 60
SUC.
PRESS
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
31 224 225 126 46 241 243 131 62 258 260 137 77 276 277 143 93 292 293 151 111 331 332 164 129 370 372 176
32 231 232 124 47 247 248 129 63 263 264 135 78 279 280 141 94 299 300 149 112 338 339 159 130 377 379 170
33
238 239 122
48
253 254 127
64
268 269 133
79
283 284 139
95
306 307 146
113
345 346 155
131
384 386 164
34 245 246 120 49 259 260 125 65 273 274 131 80 287 288 137 96 313 314 143 114 352 353 150 132 391 393 158
35
252 253 118
50
265 266 123
66
278 279 129
81
290 291 135
97
320 321 140
115
359 360 146
133
398 400 152
36 259 260 116 51 271 272 121 67 282 284 127 82 294 295 133 98 327 328 137 116 366 367 141 134 405 407 146
37 266 267 114 52 277 278 119 68 287 288 125 83 298 299 131 99 334 335 134 117 373 374 137 135 412 414 139
Table 15. 
OUTDOOR TEMPERATURE (DEG. F)
0 10 20 30 40 50 60
SUC.
PRESS
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
37 225 229 115 49 240 244 122 61 254 259 129 74 269 273 136 90 283 287 145 111 319 324 157 132 356 360 169
38 232 236 113 50 246 250 120 62 259 264 127 75 273 277 134 91 290 294 142 112 326 331 152 133 363 367 163
39
239 243 111
51
252 256 118
63
264 268 125
76
276 281 132
92
297 301 139
113
333 338 148
134
370 374 156
40 246 250 109 52 257 262 116 64 269 273 123 77 280 284 130 93 304 308 137 114 340 345 143 135 377 381 150
41
253 257 107
53
263 268 114
65
274 278 121
78
284 288 128
94
311 315 134
115
347 352 139
136
384 388 144
42 260 264 105 54 269 274 112 66 278 283 119 79 287 292 126 95 318 322 131 116 354 359 134 137 391 395 138
43 267 271 103 55 275 279 110 67 283 287 117 80 291 295 124 96 325 329 128 117 361 366 130 138 398 402 132
OUTDOOR TEMPERATURE (DEG. F)
0 10 20 30 40 50 60
SUC.
PRESS
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
32 224 233 123 47 238 247 126 61 251 260 130 76 264 273 133 91 275 284 142 108 306 315 157 125 337 346 172
33 231 240 121 48 244 253 124 62 256 265 128 77 268 277 131 92 282 291 139 109 313 322 152 126 344 353 165
34
238 247 119
49
249 259 122
63
261 270 126
78
272 281 129
93
289 298 136
110
320 329 148
127
351 360 159
35 245 254 117 50 255 264 120 64 265 274 124 79 275 284 127 94 296 305 134 111 327 336 143 128 358 367 153
36
252 261 115
51
261 270 118
65
270 279 122
80
279 288 125
95
303 312 131
112
334 343 139
129
365 374 147
37 259 268 113 52 267 276 116 66 275 284 120 81 283 292 123 96 310 319 128 113 341 350 134 130 372 381 141
38 266 275 111 53 273 282 114 67 280 289 118 82 286 295 121 97 317 326 125 114 348 357 130 131 379 388 135
Table 16. 
20
Table 18. 
OUTDOOR TEMPERATURE (DEG. F)
0 10 20 30 40 50 60
SUC.
PRESS
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
34 224 234 124 48 244 254 127 63 264 273 130 77 283 293 133 93 298 307 143 109 330 340 159 126 362 372 175
35 231 241 122 49 250 259 125 64 268 278 128 78 287 297 131 94 305 314 140 110 337 347 154 127 369 379 169
36
238 248 120
50
256 265 123
65
273 283 126
79
291 300 129
95
312 321 137
111
344 354 150
128
376 386 163
37 245 255 118 51 262 271 121 66 278 288 124 80 294 304 127 96 319 328 134 112 351 361 145 129 383 393 157
38
252 262 116
52
268 277 119
67
283 292 122
81
298 308 125
97
326 335 131
113
358 368 141
130
390 400 150
39 259 269 114 53 273 283 117 68 288 297 120 82 302 311 123 98 333 342 128 114 365 375 136 131 397 407 144
40 266 276 112 54 279 289 115 69 292 302 118 83 305 315 121 99 340 349 126 115 372 382 132 132 404 414 138
Table 19. 
OUTDOOR TEMPERATURE (DEG. F)
0 10 20 30 40 50 60
SUC.
PRESS
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
29 214 225 107 44 233 244 114 59 252 263 122 74 271 282 129 89 281 292 139 104 307 318 150 120 332 343 161
30 221 232 105 45 239 250 112 60 257 268 120 75 275 286 127 90 288 299 136 105 314 325 146 121 339 350 155
31
228 239 103
46
245 256 110
61
261 272 118
76
278 289 125
91
295 306 133
106
321 332 141
122
346 357 149
32 235 246 101 47 251 261 108 62 266 277 116 77 282 293 123 92 302 313 130 107 328 339 137 123 353 364 143
33
242 253 99
48
256 267 106
63
271 282 114
78
286 297 121
93
309 320 127
108
335 346 132
124
360 371 137
34 249 260 97 49 262 273 104 64 276 287 112 79 289 300 119 94 316 327 124 109 342 353 128 125 367 378 131
35 256 267 95 50 268 279 102 65 281 292 110 80 293 304 117 95 323 334 122 110 349 360 123 126 374 385 124
Table 17. 
OUTDOOR TEMPERATURE (DEG. F)
0 10 20 30 40 50 60
SUC.
PRESS
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
SUC.
PRESS.
LIQUID
PRESS.
DISCH.
PRESS.
DISCH.
TEMP.
26 239 259 148 40 254 273 147 53 269 288 146 67 283 303 145 81 297 316 151 97 332 352 165 112 368 388 180
27 246 266 146 41 260 279 145 54 273 293 144 68 287 307 143 82 304 323 148 98 339 359 161 113 375 395 173
28
253 273 144
42
266 285 143
55
278 298 142
69
291 310 141
83
311 330 146
99
346 366 156
114
382 402 167
29 260 280 142 43 272 291 141 56 283 302 140 70 294 314 139 84 318 337 143 100 353 373 152 115 389 409 161
30
267 287 140
44
278 297 139
57
288 307 138
71
298 318 137
85
325 344 140
101
360 380 147
116
396 416 155
31 274 294 138 45 283 303 137 58 293 312 136 72 302 321 135 86 332 351 137 102 367 387 143 117 403 423 149
32 281 301 136 46 289 309 135 59 297 317 134 73 305 325 133 87 339 358 134 103 374 394 138 118 410 430 143
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
/